HI Thanks your information about vol0
when I occur this problem in my lab...
I did your procedure

then extend vol size to add 1 G (this command's parameter seem different on 9.7)

after reboot...it occur message like below...

whether I need extend vol0's size before I meet this problem or not ??
Sorry, I am not NetAPP expert , I just want to build a NetAPP NASlab to testing .
Wencheng